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In addition to the two Trosvik teams, 220 other teams from 31 different countries played in Boys 15. They were divided into 55 different groups, whereof Trosvik IF 2 could be found in Group 45 together with V. Frölunda IF, TA Rennes 1 and Hedens IF. Trosvik IF 2 continued to Play off B after reaching 4:th place in Group 45. In the playoff they made it to 1/32 Final, but lost it against Onsala BK with 0-2. In the Final, DJK Arminia Eilendorf won over Helium FA and became the winner of Play off B in Boys 15. Trosvik IF also participated in Boys 14 during Gothia Cup 2018. They reached the 1/8 Final in B14 Play off A, but lost it against Lillestrøm SK with 0-1.